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IJSTR >> Volume 9 - Issue 6, June 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Offshore Detached Breakwaters Alignment Changes Its Impact On Scour Deposition Pattern Using Numerical Model

[Full Text]

 

AUTHOR(S)

P. Mohamed Rajab, K. Thiruvenkataswamy, Indra Kumar Dev, Mohamed Hatha Abdulla and S. Shafeer Ahamed

 

KEYWORDS

[Scour, Scour protection, Offshore detached breakwater, Alignment, Numerical model and MIKE21]

 

ABSTRACT

To protect scour around an offshore breakwater, prediction of scouring potential are desirable. In this study, scouring pattern by changing the alignment of an offshore breakwater has been investigated with subjected to uniform steady currents, using a 2-D numerical model such as DHI-MIKE21 module. Hydrodynamic analysis have been carried out for an offshore detached breakwater structure to simulate the flow field using Hydrodynamic (HD) model and sedimentation pattern using Sand Transport (ST) model. The calibrated model setup has been used for predicting the flow and scour conditions by changing alignment of an offshore detached breakwater for the following cases, viz., Case-I: an offshore breakwater oriented perpendicular to shoreline, Case-II: an offshore breakwater oriented parallel to shoreline, and Case-III: an offshore breakwater oriented 45° to shoreline. The simulated results show that by changing the orientation of an offshore breakwater with predominant current speed, the scouring can be minimized near the structure effectively. Moreover, it can be used as one of suitable shoreline protection methods to avoid shoreline erosion.

 

REFERENCES

[1] Fredsøe, J. and Sumer, B.M., 1997. Scour at the round head of a rubble-mound breakwater. p. 231-263. Coastal Engineering, Vol. 29, No. 3-4.
[2] Oumeraci, H., 1994a. Review and analysis of vertical breakwater failures: lessons learned. Coastal Engineering, Vol. 22: 3-29.
[3] Oumeraci, H., 1994b. Scour in front of vertical breakwaters: review of problems. Proc. Int. Workshop on wave barriers in deep water, Port and Harbour Research Inst., Yokusuka, Japan: 281-307.
[4] Arneborg, L., Hansen, E.A. and Juhl, J. 1995a. Numerical modelling of local scour at vertical structures. In Final proceedings of the project Monolithic (vertical) Coastal Structures, Commission of the European Communities, Directorate General for Science, Research and Development, MAST contract No. MAS2-CT92-0042, Paper3.2.
[5] Arneborg, L., Hansen, E.A. and Juhl, J. 1995b. Numerical modelling of local scour at partially reflected structures. In Final proceedings of the project Rubble Mound breakwater Failure Modes, Commission of the European Communities, Directorate General for Science, Research and Development, MAST contract No. MAS2-CT92-0047, vol.2.
[6] Gislason, K., Fredsoe,, J., Mayer, S. and Sumer, B.M. 2000. The mathematical modelling of the scour in front of the toe of a rubble mound breakwater, In Book of abstracts, 27th International Coastal Engineering Conference, ASCE, Sydney, Australia, vol. 1, paper no.130.
[7] DHI Water and Environment, 2012a. MIKE 21& MIKE 3 FLOW MODEL FM: Hydrodynamic and Transport Module Scientific Documentation. DHI, Agem Alle 5, DK-2970 Hersholm, Denmark.
[8] DHI Water and Environment, 2012c. MIKE 21: Sand Transport Module Scientific Documentation. DHI, Agem Alle 5, DK-2970 Hersholm, Denmark.
[9] Mohamed Rajab, P., and K. Thiruvenkatasamy., 2019. Prediction of Scour depth around circular pier using Numerical model, in International Journal of Mechanical Engineering and Production Engineering and Development, ISSN(P): 2249-6890; ISSN(E): 2249-8001 Vol. 9, Issue 1, January 2019, 395-404.
[10] Mohamed Rajab P., and Thiruvenkatasamy, K., 2016. Shoreline Change Studies Due to Construction of Breakwaters at Ariyankuppam River Mouth in Puducherry – a Union Territory of India, South India. Indian Journal of Science and Technology. Vol 9(45), DOI: 10.17485/ijst/2016/v9i45/101933.
[11] Mohamed Rajab, P. and Thiruvenkatasamy, K. 2017. Estimation of Longshore Sediment Transport along the Puducherry Coast, East coast of India; Based on Empirical Methods and Surf Zone Model. Indian Journal of Geo-Marine Sciences, Vol.(45).
[12] B.M. Shameem, 2018. CFD analysis and experimental validation on the effectiveness of bilge keel as a roll stabilizer. Journal of Engineering and Applied Sciences, Vol. 13: 9403-9407.